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CVE-2018-7939

18
FAUCET Score

CVE-2018-7939 describes a Factory Reset Protection (FRP) bypass vulnerability affecting several Huawei smartphone models, including the G9 Lite, Honor 5A, Honor 6X, and Honor 8, across specific firmware versions. An attacker can exploit this by enabling the talkback function during phone re-configuration, effectively disabling the boot wizard and bypassing FRP. Rated with a CVSS v3.0 score of 4.6 (Medium), this vulnerability has a physical attack vector (AV:P) and low attack complexity (AC:L), requiring no user interaction (UI:N). The potential impact is high on integrity (I:H), as it allows an unauthorized bypass of a security feature. There is no evidence of active exploitation, and no public exploit code (Metasploit, Nuclei, ExploitDB) is available. Community discussion and media coverage for this CVE are minimal, indicating low public attention.

Impacted Technologies

VendorProductVersion(s)CPE
< vns-l53c605b120custc605d103CPE matchmatch criteria
cpe:2.3:o:huawei:g9_lite_firmware:*:*:*:*:*:*:*:*
< cam-l03c605b143custc605d008CPE matchmatch criteria
cpe:2.3:o:huawei:honor_5a_firmware:*:*:*:*:*:*:*:*
< cam-l21c10b145CPE matchmatch criteria
cpe:2.3:o:huawei:honor_5a_firmware:*:*:*:*:*:*:*:*
< cam-l21c185b156CPE matchmatch criteria
cpe:2.3:o:huawei:honor_5a_firmware:*:*:*:*:*:*:*:*
< cam-l21c223b133CPE matchmatch criteria
cpe:2.3:o:huawei:honor_5a_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

4.6MEDIUM

CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Attack Vector
PHYSICAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
0.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.24%
Probability of exploitation in next 30 days
EPSS Percentile
14.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0024 is in the 29th percentile among its peer group of 1,532 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.2 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

huawei.com / en/psirt/security-advisories/huawei-sa-20180905-01-frpbypass-en
Vendor Advisory